名词解释：铅酸电池(VRLA)，是一种电极主要由铅及其氧化物制成，电解液是硫酸溶液的蓄电池。铅酸电池放电状态下，正极主要成分为二氧化铅，负极主要成分为铅;充电状态下，正负极的主要成分均为硫酸铅。你知道怎么用英语表达吗?

Shanghai's environmental watchdog ordered two factories in its suburbs to halt production pending an investigation into the source of lead poisoning among children in a nearby village.

The Shanghai environmental protection bureau said in a notice on its website on Friday that it was studying lead emissions from the two factories, one of which is a large lead-acid battery plant run by United States-based Johnson Controls.

The Pudong district government, where the cases were found, issued a statement saying it believed the Johnson Controls factory was the main source of lead emissions in the area.

上海环境监督部门要求郊区两家企业停产，调查周围村庄儿童血铅中毒来源。周五，上海环保局在其网站上发布通知，称正在调查两家企业的铅排放，其中有家企业是由美国江森自控经营的大型铅酸电池厂。事件所在地区的上海浦东区政府已发布声明，称江森自控厂家是该地区铅排放的主要来源。

【讲解】文中的lead-acid battery即指铅酸电池，文中的lead poisoning指铅中毒，血铅超标可以说成excessive lead in blood。文中的halt production指停产，也可以说成suspend production。在该事件之前，国家就对全国铅酸电池企业进行停产整顿，锂电池(lithium battery)也许是以后的发展方向。